(gdb): Pop up current GUD buffer if user

tries to start a second session in graphical mode.

1 files changed, 4 insertions, 1 deletions

diff --git a/lisp/progmodes/gud.el b/lisp/progmodes/gud.el
index 1662af1c924..8db7c28219e 100644
--- a/lisp/progmodes/gud.el
+++ b/lisp/progmodes/gud.el
@@ -690,7 +690,10 @@ session."
            (buffer-name gud-comint-buffer)
            (get-buffer-process gud-comint-buffer)
            (with-current-buffer gud-comint-buffer (eq gud-minor-mode 'gdba)))
-      (error "Multiple debugging requires restarting in text command mode"))
+      (let ((same-window-regexps))
+        (display-buffer gud-comint-buffer)
+        (error
+         "Multiple debugging requires restarting in text command mode")))
 
   (gud-common-init command-line nil 'gud-gdb-marker-filter)
   (set (make-local-variable 'gud-minor-mode) 'gdb)